Answer:
54.26
Step-by-step explanation:
0.4+0.86= 1.26
51+2= 53
53+1.26= 54.26
Answer:
please mark me as brainlest
Step-by-step explanation:
B is the answers for the question
<span>Answer:
Since the pKb is is 4.75, the pKa is 9.25. Also, in the Henderson Hassalbalch, Molarity and moles are generally interchangeable if its the same solution.
pH = pKa + log (NH3/NH4Cl)
9.05 = 9.25 + log (Mole Ratio)
-0.2 = log (Mole Ratio)
10^-0.2 = Mole Ratio
Mole Ratio = 0.631
Now, that means for every mole of Acid, there are 0.631 moles of base. So we multiply the moles of base by the molar mass of NH3 and we multiply the moles of Acid by the molar mass of NH4Cl.
Base: 0.631 mol x 17.0 g/mol = 10.7 g NH3
Acid: 1.00 mol x 53.5 g/mol = 53.5 g NH4Cl
Now we just divide them to get the ratio.
10.7 g NH3 / 53.5 g NH4Cl = 0.200</span>
The z-score is the ratio of the difference of sample and means to the standard deviation. Then the correct option is A.
<h3>What is a z-score?</h3>
The z-score is a numerical measurement used in statistics of the value's relationship to the mean of a group of values, measured in terms of standards from the mean.
The scores of an eighth-grade math test have a normal distribution with a mean of 83 and a standard deviation of 5. If the x is 92. Then the test score will be
The z-score will be given as
More about the z-score link is given below.
brainly.com/question/15016913
Step-by-step explanation:
The question is not properly formated, here is the correct format
<em>The revenue function is given by R(x)=x⋅p(x) dollars where x is the number of units sold and p(x) is the unit price. If p(x)=274−4x, find the revenue if 12 units are sold. Round to two decimal places.</em>
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Step one
given the following expression
Revenue
Unit price
Required
the revenue when 12 units were sold
let us find the unit price for 12 units
Hence the unit price is$ 226
Revenue is $2712